冰雪灾害对粤北杉木林土壤养分状况和酶活性的影响  

Impact of Ice-Snow Damage on Soil Nutrient and Enzyme in a Cunninghamia lanceolata Woodland in Northern Guangdong Province,China

作　　者：李洁[1] 周彤彤[1] 侯晓丽[1] 薛立[1] 

机构地区：[1]华南农业大学林学院与风景园林学院,广东广州510642

出　　处：《西南林业大学学报（自然科学）》2016年第4期36-41,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：中央财政林业科技推广示范项目(2015-GDTK-07)资助

摘　　要：2008年1—2月,雨雪冰冻天气袭击广东粤北地区,造成大面积的杉木林被破坏。为了给杉木林的恢复提供科学依据,研究了冰雪灾害对杉木林地土壤特性的影响。结果表明:2008—2011年,受灾杉木林地上层土壤有机质、全氮、碱解N,上、下层土壤速效磷随时间推移均呈现上升-下降-上升的变化趋势;上、下层土壤全磷则为先升后降;下层土壤有机质、全氮,上、下层土壤全钾和速效钾为先降后升;下层土壤碱解N持续上升。上、下层土壤脲酶和过氧化氢酶活性为先降后升,上、下层土壤磷酸酶活性为先降后升,然后小幅变化。总体来说冰雪灾害对土壤养分状况和酶活性产生了显著影响。A severe ice storm damaged forests across northern area of Guangdong Province from January to February 2008, and resulted in extensive and severe damage of Cunninghamia lanceolata forests. This paper studied effect of icesnow damage on soil characteristics in a Clanceolata stand in the north of Guangdong Province, to provide a scientific basis for recovery of Clanceolata stands suffering from ice storm damage. From 2008 to 2011, the contents of organic matter, total N and alkahihydrolyzable N of the upper soil layer and available P of the upper and lower soil layers increased followed by a decrease and then increased, whereas content of total P of the two soil layers increased and then decreased. The contents of organic matter, total N of lower soil layer and total K and available K of the two soil layers decreased followed by an increase, and alkahihydrolyzable N of lower soil layer continuously increased. Activities of urease and catalase decreased, and then increased in upper and lower soil layers. Phosphatase activity decreased followed by an increase and then slightly changed in the upper and lower soil layers. Our results suggest that ice storm can lead to significant changes in soil nutrient and enzyme activity.

关 键 词：冰雪灾害 杉木 土壤养分 酶活性 

分 类 号：S714.5[农业科学—林学]